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Tolmetin: Drug information

Tolmetin: Drug information
2025© UpToDate, Inc. and its affiliates and/or licensors. All Rights Reserved.
For additional information see "Tolmetin: Patient drug information" and "Tolmetin: Pediatric drug information"

For abbreviations, symbols, and age group definitions show table
ALERT: US Boxed Warning
Cardiovascular risk:

Nonsteroidal anti-inflammatory agents (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction (MI), and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use.

Tolmetin is contraindicated during the perioperative setting of coronary artery bypass graft (CABG) surgery.

Gastrointestinal risk:

NSAIDs cause an increased risk of serious gastrointestinal (GI) adverse events, including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Elderly patients are at greater risk for serious GI events.

Brand Names: US
  • Tolectin 600
Pharmacologic Category
  • Analgesic, Nonopioid;
  • Nonsteroidal Anti-inflammatory Drug (NSAID), Oral
Dosing: Adult

Note: Use the lowest effective dose for the shortest possible duration.

Osteoarthritis, rheumatoid arthritis

Osteoarthritis, rheumatoid arthritis: Oral: Initial: 400 mg 3 times daily; adjust dose according to patient response after 1 to 2 weeks; Maintenance: 600 mg to 1,800 mg/day in 3 divided doses (maximum: 1,800 mg/day)

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Adult

There are no dosage adjustments provided in the manufacturer's labeling; not recommended in patients with advanced renal disease.

Dosing: Liver Impairment: Adult

There are no dosage adjustments provided in the manufacturer's labeling; use with caution to avoid adverse effects and discontinue if hepatic function worsens.

Dosing: Older Adult

Note: Unless alternative agents are ineffective and a gastroprotective agent can be administered, avoid short-term scheduled use in combination with corticosteroids, anticoagulants, or antiplatelet agents or chronic use with or without medications that increase risk for bleeding (Ref).

Refer to adult dosing.

Dosing: Pediatric

(For additional information see "Tolmetin: Pediatric drug information")

Dosage guidance:

Safety: Use the lowest effective dose for the shortest possible duration.

Juvenile idiopathic/rheumatoid arthritis

Juvenile idiopathic/rheumatoid arthritis: Children ≥2 years and Adolescents: Oral: Initial: 20 mg/kg/day in 3 to 4 divided doses; Maintenance: 15 to 30 mg/kg/day in 3 to 4 divided doses; maximum daily dose: 30 mg/kg/day not to exceed 1,800 mg/day.

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Pediatric

There are no pediatric-specific dosage adjustments provided in the manufacturer's labeling; some experts have suggested the following:

KDIGO 2012 guidelines provide the following recommendations for NSAIDs (Ref):

eGFR 30 to <60 mL/minute/1.73 m2: Temporarily discontinue in patients with intercurrent disease that increases risk of acute kidney injury

eGFR <30 mL/minute/1.73 m2: Avoid use

Dosing: Liver Impairment: Pediatric

There are no dosage adjustments provided in the manufacturer's labeling; use with caution

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.

>10%: Gastrointestinal: Nausea (11%)

1% to 10%:

Cardiovascular: Chest pain (1% to 3%), edema (3% to 9%), increased blood pressure (3% to 9%)

Dermatologic: Skin irritation (1% to 3%)

Endocrine & metabolic: Weight gain (3% to 9%), weight loss (3% to 9%)

Gastrointestinal: Abdominal pain (3% to 9%), constipation (1% to 3%), diarrhea (3% to 9%), dyspepsia (3% to 9%), flatulence (3% to 9%), gastritis (1% to 3%), gastrointestinal distress (3% to 9%), peptic ulcer (1% to 3%), vomiting (3% to 9%)

Genitourinary: Urinary tract infection (1% to 3%)

Hematologic & oncologic: Decreased hematocrit (≤3%; transient), decreased hemoglobin (≤3%; transient)

Nervous system: Asthenia (3% to 9%), depression (1% to 3%), dizziness (3% to 9%), drowsiness (1% to 3%), headache (3% to 9%)

Ophthalmic: Visual disturbance (1% to 3%)

Otic: Tinnitus (1% to 3%)

Renal: Increased blood urea nitrogen (1% to 3%)

<1%:

Cardiovascular: Heart failure

Dermatologic: Erythema multiforme, exfoliative dermatitis, fixed drug eruption, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria

Gastrointestinal: Gastrointestinal hemorrhage, gastrointestinal perforation, glossitis, stomatitis

Genitourinary: Dysuria, hematuria, proteinuria

Hematologic & oncologic: Agranulocytosis, granulocytopenia, hemolytic anemia, lymphadenopathy, purpuric disease, thrombocytopenia

Hepatic: Abnormal liver function, hepatitis

Hypersensitivity: Nonimmune anaphylaxis, serum sickness

Renal: Kidney failure

Miscellaneous: Fever

Frequency not defined:

Cardiovascular: Acute myocardial infarction, coronary thrombosis

Gastrointestinal: Gastrointestinal inflammation, gastrointestinal ulcer

Nervous system: Cerebrovascular accident

Postmarketing:

Hepatic: Fulminant hepatitis, hepatic failure, hepatic necrosis, hepatotoxicity (idiosyncratic; Chalasani 2021), jaundice

Hypersensitivity: Drug rash with eosinophilia and systemic symptoms

Renal: Interstitial nephritis, nephrotic syndrome

Contraindications

Hypersensitivity to tolmetin or any component of the formulation; in the setting of CABG surgery; patients who have experienced asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs.

Warnings/Precautions

Concerns related to adverse effects:

• Anaphylactoid reactions: Even in patients without prior exposure anaphylactoid reactions may occur; patients with "aspirin triad" (bronchial asthma, aspirin intolerance, rhinitis) may be at increased risk. Do not use in patients who experience bronchospasm, asthma, rhinitis, or urticaria with nonsteroidal anti-inflammatory drug (NSAID) or aspirin therapy.

• Cardiovascular events: [US Boxed Warning]: NSAIDs are associated with an increased risk of adverse cardiovascular thrombotic events, including MI and stroke. Risk may be increased with duration of use or pre-existing cardiovascular risk factors or disease. Carefully evaluate individual cardiovascular risk profiles prior to prescribing. Use caution with fluid retention. Avoid use in heart failure (FDA 2015). Concurrent administration of ibuprofen, and potentially other nonselective NSAIDs, may interfere with aspirin’s cardioprotective effect. Use the lowest effective dose for the shortest duration of time, consistent with individual patient goals, to reduce risk of cardiovascular events; alternate therapies should be considered for patients at high risk.

• CNS effects: May cause drowsiness, dizziness, blurred vision, and other neurologic effects which may impair physical or mental abilities; patients must be cautioned about performing tasks which require mental alertness (eg, operating machinery or driving).

• Drug reaction with eosinophilia and systemic symptoms: Potentially serious, sometimes fatal, drug reaction with eosinophilia and systemic symptoms (DRESS), also known as multiorgan hypersensitivity reactions, has been reported with NSAIDs. Monitor for signs and symptoms (eg, fever, rash, lymphadenopathy, eosinophilia) in association with other organ system involvement (eg, hepatitis, nephritis, hematological abnormalities, myocarditis, myositis). Early symptoms of hypersensitivity reaction (eg, lymphadenopathy, fever) may occur without rash; discontinue therapy and further evaluate if DRESS is suspected.

• GI events: [US Boxed Warning]: NSAIDs may increase risk of GI irritation, inflammation, ulceration, bleeding, and perforation. These events may occur at any time during therapy and without warning. Use caution with a history of GI disease (bleeding or ulcers), concurrent therapy with aspirin, anticoagulants and/or corticosteroids, smoking, use of alcohol, the elderly or debilitated patients. Use the lowest effective dose for the shortest duration of time, consistent with individual patient goals, to reduce risk of GI adverse events; alternate therapies should be considered for patients at high risk. When used concomitantly with aspirin, a substantial increase in the risk of GI complications (eg, ulcer) occurs; concomitant gastroprotective therapy (eg, proton pump inhibitors) is recommended (Bhatt, 2008). In patients with a history of acute lower GI bleeding, avoid use of non-aspirin NSAIDs, especially if due to angioectasia or diverticulosis (Strate 2016).

• Hematologic effects: Platelet adhesion and aggregation may be decreased; may prolong bleeding time; patients with coagulation disorders or who are receiving anticoagulants should be monitored closely. Anemia may occur; patients on long-term NSAID therapy should be monitored for anemia. Rarely, NSAID use has been associated with potentially severe blood dyscrasias (eg, agranulocytosis, thrombocytopenia, aplastic anemia).

• Hepatic effects: Notable elevations of ALT or AST (eg, >3 x ULN) have been reported. Severe hepatic reactions (eg, jaundice, fulminant hepatitis, liver necrosis, liver failure) have occurred with NSAID use, some with fatal outcomes; discontinue if clinical signs or symptoms of liver disease develop, or if systemic manifestations occur (eg, eosinophilia, rash).

• Hyperkalemia: NSAID use may increase the risk of hyperkalemia, particularly in the elderly, diabetics, renal disease, and with concomitant use of other agents capable of inducing hyperkalemia (eg, ACE-inhibitors). Monitor potassium closely.

• Renal effects: NSAID use may compromise existing renal function; dose-dependent decreases in prostaglandin synthesis may result from NSAID use, reducing renal blood flow, which may cause renal decompensation. Patients with impaired renal function, dehydration, heart failure, liver dysfunction, those taking diuretics and ACE inhibitors, and the elderly are at greater risk of renal toxicity. Rehydrate patient before starting therapy; monitor renal function closely. Long-term NSAID use may result in renal papillary necrosis and other renal injury.

• Skin reactions: NSAIDs may cause potentially fatal serious skin adverse events including exfoliative dermatitis, Stevens-Johnson syndrome (SJS), and toxic epidermal necrolysis (TEN); discontinue use at first sign of skin rash or hypersensitivity.

Disease-related concerns:

• Asthma: Do not administer to patients with aspirin-sensitive asthma; severe bronchospasm may occur. Use caution in patients with other forms of asthma.

• Bariatric surgery: Gastric ulceration: Avoid chronic use of oral nonselective NSAIDs after bariatric surgery; development of anastomotic ulcerations/perforations may occur (Bhangu 2014; Mechanick 2020). Short-term use of celecoxib or IV ketorolac are recommended as part of a multimodal pain management strategy for postoperative pain (Chou 2016; Horsley 2019; Thorell 2016).

• Coronary artery bypass graft surgery: [US Boxed Warning]: Use is contraindicated for treatment of perioperative pain in the setting of coronary artery bypass graft (CABG) surgery. Risk of MI and stroke may be increased with use following CABG surgery.

• Hepatic impairment: Use with caution in patients with decreased hepatic function. Closely monitor patients with any abnormal LFT. Patients with advanced hepatic disease are at an increased risk of GI bleeding and kidney failure with NSAIDs (AASLD [Biggins 2021]; AASLD [Runyon 2013]).

• Hypertension: Use with caution; may cause new-onset hypertension or worsening of existing hypertension.

• Renal impairment: Not recommended for use in patients with advanced renal disease; monitor closely if therapy must be initiated.

Special populations:

• Older adult: Older adults are at increased risk for adverse effects (especially peptic ulceration, CNS effects, renal toxicity) from NSAIDs even at low doses.

Other warnings/precautions:

• Surgical/dental procedures: Withhold for at least 4 to 6 half-lives prior to surgical or dental procedures.

Dosage Forms: US

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Capsule, Oral:

Generic: 400 mg

Tablet, Oral:

Tolectin 600: 600 mg [contains corn starch]

Generic: 600 mg

Generic Equivalent Available: US

Yes

Pricing: US

Capsules (Tolmetin Sodium Oral)

400 mg (per each): $44.44

Tablets (Tolectin 600 Oral)

600 mg (per each): $47.43

Tablets (Tolmetin Sodium Oral)

600 mg (per each): $55.96

Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.

Administration: Pediatric

Oral: May administer with antacid to decrease GI adverse effects.

Medication Guide and/or Vaccine Information Statement (VIS)

An FDA-approved patient medication guide, which is available with the product information and at NSAIDs Class Medication Guide, must be dispensed with this medication.

Use: Labeled Indications

Juvenile rheumatoid arthritis: Treatment of juvenile rheumatoid arthritis (JRA) in pediatric patients ≥2 years.

Rheumatoid/Osteoarthritis: Relief of signs and symptoms of rheumatoid and osteoarthritis, including acute flares and the long-term management of the chronic disease.

Medication Safety Issues
Sound-alike/look-alike issues:

Tolmetin may be confused with tolcapone

Older Adult: High-Risk Medication:

Beers Criteria: Tolmetin is identified in the Beers Criteria as a potentially inappropriate medication to be avoided for chronic use in patients 65 years and older (unless alternative agents ineffective and patient can receive concomitant gastroprotective agent) due to increased risk of GI bleeding and peptic ulcer disease in older adults in high-risk category (eg, older than 75 years of age or receiving concomitant oral/parenteral corticosteroids, anticoagulants, or antiplatelet agents). In addition, avoid for short-term scheduled use in combination with oral/parenteral corticosteroids, anticoagulants, or antiplatelet agents unless alternatives are ineffective and patient can receive concomitant gastroprotective agent (Beers Criteria [AGS 2023]).

Metabolism/Transport Effects

None known.

Drug Interactions

Note: Interacting drugs may not be individually listed below if they are part of a group interaction (eg, individual drugs within “CYP3A4 Inducers [Strong]” are NOT listed). For a complete list of drug interactions by individual drug name and detailed management recommendations, use the drug interactions program by clicking on the “Launch drug interactions program” link above.

5-Aminosalicylic Acid Derivatives: Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of 5-Aminosalicylic Acid Derivatives. Risk C: Monitor

Abciximab: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Abrocitinib: Agents with Antiplatelet Effects may increase antiplatelet effects of Abrocitinib. Risk X: Avoid

Acalabrutinib: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Acemetacin: May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid

Alcohol (Ethyl): May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of GI bleeding may be increased with this combination. Risk C: Monitor

Aliskiren: Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of Aliskiren. Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of Aliskiren. Risk C: Monitor

Aminoglycosides: Nonsteroidal Anti-Inflammatory Agents may decrease excretion of Aminoglycosides. Data only in premature infants. Risk C: Monitor

Aminolevulinic Acid (Systemic): Photosensitizing Agents may increase photosensitizing effects of Aminolevulinic Acid (Systemic). Risk X: Avoid

Aminolevulinic Acid (Topical): Photosensitizing Agents may increase photosensitizing effects of Aminolevulinic Acid (Topical). Risk C: Monitor

Anagrelide: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Angiotensin II Receptor Blockers: Nonsteroidal Anti-Inflammatory Agents may decrease therapeutic effects of Angiotensin II Receptor Blockers. The combination of these two agents may also significantly decrease glomerular filtration and renal function. Angiotensin II Receptor Blockers may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the combination may result in a significant decrease in renal function. Risk C: Monitor

Angiotensin-Converting Enzyme Inhibitors: Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of Angiotensin-Converting Enzyme Inhibitors. Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the combination may result in a significant decrease in renal function. Risk C: Monitor

Anticoagulants (Miscellaneous Agents): Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Anticoagulants (Miscellaneous Agents). Risk C: Monitor

Antiplatelet Agents (P2Y12 Inhibitors): Agents with Antiplatelet Effects may increase antiplatelet effects of Antiplatelet Agents (P2Y12 Inhibitors). Risk C: Monitor

Aspirin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may decrease therapeutic effects of Aspirin. Aspirin may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Specifically, the risk for bleeding may be increased. Aspirin may decrease serum concentration of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Management: In general, avoid regular, frequent use of NSAIDs with aspirin whenever possible. If combined, monitor for increased bleeding and a reduced cardioprotective effect of aspirin. Risk D: Consider Therapy Modification

Bemiparin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Bemiparin. Management: Avoid this combination if possible, due to an increased risk of bleeding. If coadministration cannot be avoided, monitor patients closely for clinical and laboratory evidence of bleeding. Risk D: Consider Therapy Modification

Beta-Blockers: Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of Beta-Blockers. Risk C: Monitor

Bile Acid Sequestrants: May decrease absorption of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Bisphosphonate Derivatives: Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of Bisphosphonate Derivatives. Both an increased risk of gastrointestinal ulceration and an increased risk of nephrotoxicity are of concern. Risk C: Monitor

Caplacizumab: Agents with Antiplatelet Effects may increase adverse/toxic effects of Caplacizumab. Specifically, the risk of bleeding may be increased. Risk C: Monitor

Cardiac Glycosides: Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of Cardiac Glycosides. Risk C: Monitor

Collagenase (Systemic): Agents with Antiplatelet Effects may increase adverse/toxic effects of Collagenase (Systemic). Specifically, the risk of injection site bruising and or bleeding may be increased. Risk C: Monitor

Corticosteroids (Systemic): May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Risk C: Monitor

CycloSPORINE (Systemic): Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of CycloSPORINE (Systemic). Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of CycloSPORINE (Systemic). CycloSPORINE (Systemic) may increase serum concentration of Nonsteroidal Anti-Inflammatory Agents. Management: Consider alternatives to nonsteroidal anti-inflammatory agents (NSAIDs). Monitor for evidence of nephrotoxicity, as well as increased serum cyclosporine concentrations and systemic effects (eg, hypertension) during concomitant therapy with NSAIDs. Risk D: Consider Therapy Modification

Dasatinib: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Deferasirox: Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of Deferasirox. Specifically, the risk for GI ulceration/irritation or GI bleeding may be increased. Risk C: Monitor

Deoxycholic Acid: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Desirudin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Desirudin. Risk C: Monitor

Desmopressin: Nonsteroidal Anti-Inflammatory Agents may increase hyponatremic effects of Desmopressin. Risk C: Monitor

Direct Oral Anticoagulants (DOACs): Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Direct Oral Anticoagulants (DOACs). Risk C: Monitor

Drospirenone-Containing Products: May increase hyperkalemic effects of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Enoxaparin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Enoxaparin. Management: Discontinue nonselective NSAIDs prior to initiation of enoxaparin whenever possible. If coadministration cannot be avoided, monitor patients closely for clinical and laboratory evidence of bleeding. Risk D: Consider Therapy Modification

Eplerenone: Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of Eplerenone. Nonsteroidal Anti-Inflammatory Agents may increase hyperkalemic effects of Eplerenone. Risk C: Monitor

Fondaparinux: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Fondaparinux. Management: Discontinue nonselective nonsteroidal anti-inflammatory agents prior to the initiation of fondaparinux, if possible. If coadministration is required, monitor patients closely for signs and symptoms of bleeding. Risk D: Consider Therapy Modification

Glycoprotein IIb/IIIa Inhibitors: Agents with Antiplatelet Effects may increase antiplatelet effects of Glycoprotein IIb/IIIa Inhibitors. Risk C: Monitor

Heparin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Heparin. Risk C: Monitor

Heparins (Low Molecular Weight): Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Heparins (Low Molecular Weight). Risk C: Monitor

Herbal Products with Anticoagulant/Antiplatelet Effects: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

HydrALAZINE: Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of HydrALAZINE. Risk C: Monitor

Ibritumomab Tiuxetan: Agents with Antiplatelet Effects may increase antiplatelet effects of Ibritumomab Tiuxetan. Risk C: Monitor

Ibrutinib: Agents with Antiplatelet Effects may increase adverse/toxic effects of Ibrutinib. Specifically, the risk of bleeding and hemorrhage may be increased. Risk C: Monitor

Inotersen: Agents with Antiplatelet Effects may increase adverse/toxic effects of Inotersen. Specifically, the risk of bleeding may be increased. Risk C: Monitor

Ketorolac (Nasal): May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid

Ketorolac (Systemic): Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of Ketorolac (Systemic). Risk X: Avoid

Limaprost: May increase adverse/toxic effects of Agents with Antiplatelet Effects. Specifically, the risk of bleeding may be increased. Risk C: Monitor

Lithium: Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of Lithium. Management: Consider reducing the lithium dose when initiating a NSAID. Monitor for increased lithium therapeutic/toxic effects if a NSAID is initiated/dose increased, or decreased effects if a NSAID is discontinued/dose decreased. Risk D: Consider Therapy Modification

Loop Diuretics: Nonsteroidal Anti-Inflammatory Agents may decrease diuretic effects of Loop Diuretics. Loop Diuretics may increase nephrotoxic effects of Nonsteroidal Anti-Inflammatory Agents. Management: Monitor for evidence of kidney injury or decreased therapeutic effects of loop diuretics with concurrent use of an NSAID. Consider avoiding concurrent use in CHF or cirrhosis. Concomitant use of bumetanide with indomethacin is not recommended. Risk D: Consider Therapy Modification

Macimorelin: Coadministration of Nonsteroidal Anti-Inflammatory Agents and Macimorelin may alter diagnostic results. Risk X: Avoid

MetFORMIN: Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of MetFORMIN. Risk C: Monitor

Methotrexate: Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of Methotrexate. Management: Avoid coadministration of higher dose methotrexate (such as that used for the treatment of oncologic conditions) and NSAIDs. Use caution if coadministering lower dose methotrexate and NSAIDs. Risk D: Consider Therapy Modification

Methoxsalen (Systemic): Photosensitizing Agents may increase photosensitizing effects of Methoxsalen (Systemic). Risk C: Monitor

Methoxyflurane: Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of Methoxyflurane. Risk X: Avoid

Mifamurtide: Nonsteroidal Anti-Inflammatory Agents may decrease therapeutic effects of Mifamurtide. Risk X: Avoid

Miscellaneous Antiplatelets: Agents with Antiplatelet Effects may increase antiplatelet effects of Miscellaneous Antiplatelets. Risk C: Monitor

Nadroparin: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Nadroparin. Management: Coadministration of NSAIDs and nadroparin is not recommended due to an increased risk of bleeding. If coadministration is required, monitor patients closely for clinical and laboratory signs of bleeding. Risk D: Consider Therapy Modification

Naftazone: May increase antiplatelet effects of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Nonsteroidal Anti-Inflammatory Agents (Topical): Nonsteroidal Anti-Inflammatory Agents (Topical) may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of gastrointestinal (GI) toxicity is increased. Management: Coadministration of systemic nonsteroidal anti-inflammatory drugs (NSAIDs) and topical NSAIDs is not recommended. If systemic NSAIDs and topical NSAIDs, ensure the benefits outweigh the risks and monitor for increased NSAID toxicities. Risk D: Consider Therapy Modification

Nonsteroidal Anti-Inflammatory Agents: May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk for gastrointestinal toxicity is increased. Risk X: Avoid

Obinutuzumab: Agents with Antiplatelet Effects may increase adverse/toxic effects of Obinutuzumab. Specifically, the risk of bleeding may be increased. Management: Consider avoiding coadministration of obinutuzumab and agents with antiplatelet effects, especially during the first cycle of obinutuzumab therapy. Risk D: Consider Therapy Modification

Omacetaxine: Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of Omacetaxine. Specifically, the risk for bleeding-related events may be increased. Risk C: Monitor

Pentosan Polysulfate Sodium: Agents with Antiplatelet Effects may increase adverse/toxic effects of Pentosan Polysulfate Sodium. Specifically, the risk of hemorrhage may be increased. Risk C: Monitor

Phenylbutazone: May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid

Pirtobrutinib: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Polyethylene Glycol-Electrolyte Solution: Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of Polyethylene Glycol-Electrolyte Solution. Risk C: Monitor

Porfimer: Photosensitizing Agents may increase photosensitizing effects of Porfimer. Risk X: Avoid

Potassium Salts: Nonsteroidal Anti-Inflammatory Agents may increase hyperkalemic effects of Potassium Salts. Risk C: Monitor

Potassium-Sparing Diuretics: Nonsteroidal Anti-Inflammatory Agents may increase hyperkalemic effects of Potassium-Sparing Diuretics. Nonsteroidal Anti-Inflammatory Agents may decrease antihypertensive effects of Potassium-Sparing Diuretics. Risk C: Monitor

PRALAtrexate: Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of PRALAtrexate. More specifically, NSAIDS may decrease the renal excretion of pralatrexate. Management: Avoid coadministration of pralatrexate with nonsteroidal anti-inflammatory drugs (NSAIDs). If coadministration cannot be avoided, closely monitor for increased pralatrexate serum levels or toxicity. Risk D: Consider Therapy Modification

Probenecid: May increase serum concentration of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Prostaglandins (Ophthalmic): Nonsteroidal Anti-Inflammatory Agents may decrease therapeutic effects of Prostaglandins (Ophthalmic). Nonsteroidal Anti-Inflammatory Agents may also enhance the therapeutic effects of Prostaglandins (Ophthalmic). Risk C: Monitor

Quinolones: Nonsteroidal Anti-Inflammatory Agents may increase neuroexcitatory and/or seizure-potentiating effects of Quinolones. Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of Quinolones. Risk C: Monitor

Salicylates: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase adverse/toxic effects of Salicylates. An increased risk of bleeding may be associated with use of this combination. Risk X: Avoid

Selective Serotonin Reuptake Inhibitor: May increase antiplatelet effects of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Nonsteroidal Anti-Inflammatory Agents (Nonselective) may decrease therapeutic effects of Selective Serotonin Reuptake Inhibitor. Management: Consider alternatives to NSAIDs. Monitor for evidence of bleeding and diminished antidepressant effects. It is unclear whether COX-2-selective NSAIDs reduce risk. Risk D: Consider Therapy Modification

Selumetinib: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Serotonin/Norepinephrine Reuptake Inhibitor: May increase antiplatelet effects of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Risk C: Monitor

Sincalide: Drugs that Affect Gallbladder Function may decrease therapeutic effects of Sincalide. Management: Consider discontinuing drugs that may affect gallbladder motility prior to the use of sincalide to stimulate gallbladder contraction. Risk D: Consider Therapy Modification

Sodium Phosphates: May increase nephrotoxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of acute phosphate nephropathy may be enhanced. Risk C: Monitor

Sulprostone: Nonsteroidal Anti-Inflammatory Agents may decrease therapeutic effects of Sulprostone. Risk X: Avoid

Tacrolimus (Systemic): Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of Tacrolimus (Systemic). Risk C: Monitor

Tenofovir Products: Nonsteroidal Anti-Inflammatory Agents may increase nephrotoxic effects of Tenofovir Products. Management: Seek alternatives to these combinations whenever possible. Avoid use of tenofovir with multiple NSAIDs or any NSAID given at a high dose due to a potential risk of acute renal failure. Diclofenac appears to confer the most risk. Risk D: Consider Therapy Modification

Tenoxicam: May increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid

Thiazide and Thiazide-Like Diuretics: Nonsteroidal Anti-Inflammatory Agents may decrease therapeutic effects of Thiazide and Thiazide-Like Diuretics. Thiazide and Thiazide-Like Diuretics may increase nephrotoxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Thrombolytic Agents: Agents with Antiplatelet Effects may increase adverse/toxic effects of Thrombolytic Agents. Specifically, the risk of bleeding may be increased. Risk C: Monitor

Tipranavir: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Tolperisone: Nonsteroidal Anti-Inflammatory Agents may increase adverse/toxic effects of Tolperisone. Specifically, the risk of hypersensitivity reactions may be increased. Tolperisone may increase therapeutic effects of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Tricyclic Antidepressants: May increase antiplatelet effects of Nonsteroidal Anti-Inflammatory Agents. Tricyclic Antidepressants may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of major adverse cardiac events (MACE), hemorrhagic stroke, ischemic stroke, and heart failure may be increased. Risk C: Monitor

Vancomycin: Nonsteroidal Anti-Inflammatory Agents may increase serum concentration of Vancomycin. Risk C: Monitor

Verteporfin: Photosensitizing Agents may increase photosensitizing effects of Verteporfin. Risk C: Monitor

Vitamin E (Systemic): May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Vitamin K Antagonists: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may increase anticoagulant effects of Vitamin K Antagonists. Management: Consider alternatives to this combination when possible. If the combination must be used, monitor coagulation status closely and advise patients to promptly report any evidence of bleeding or bruising. Risk D: Consider Therapy Modification

Volanesorsen: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Zanubrutinib: May increase antiplatelet effects of Agents with Antiplatelet Effects. Risk C: Monitor

Food Interactions

Tolmetin peak serum concentrations may be decreased if taken with food or milk. Management: May be administered with antacids to decrease GI upset.

Reproductive Considerations

Nonsteroidal anti-inflammatory drugs (NSAIDs) may delay or prevent rupture of ovarian follicles. This may be associated with infertility that is reversible upon discontinuation of the medication. Consider discontinuing use in patients having difficulty conceiving or those undergoing investigation of fertility (Matyas 2015; Micu 2011).

Based on available information, NSAIDs can be continued in males with rheumatic and musculoskeletal diseases who are planning to father a child (ACR [Sammaritano 2020]).

Pregnancy Considerations

The use of nonsteroidal anti-inflammatory drugs (NSAIDs) close to conception may be associated with an increased risk of miscarriage due to cyclooxygenase-2 inhibition interfering with implantation (Bermas 2014; Bloor 2013).

Birth defects have been observed following in utero NSAID exposure in some studies; however, data are conflicting (Bloor 2013). Nonteratogenic effects, including prenatal constriction of the ductus arteriosus, persistent pulmonary hypertension of the newborn, oligohydramnios, necrotizing enterocolitis, renal dysfunction or failure, and intracranial hemorrhage have been observed in the fetus/neonate following in utero NSAID exposure (Bermas 2014; Bloor 2013). Maternal NSAID use may cause fetal renal dysfunction leading to oligohydramnios. Although rare, this may occur as early as 20 weeks' gestation and is more likely to occur with prolonged maternal use. Oligohydramnios may be reversible following discontinuation of the NSAID (Dathe 2019; FDA 2020). In addition, nonclosure of the ductus arteriosus postnatally may occur and be resistant to medical management (Bermas 2014; Bloor 2013).

Maternal use of NSAIDs should be avoided beginning at 20 weeks' gestation. If NSAID use is necessary between 20 and 30 weeks' gestation, limit use to the lowest effective dose and shortest duration possible; consider ultrasound monitoring of amniotic fluid if treatment extends beyond 48 hours and discontinue the NSAID if oligohydramnios is found (FDA 2020). Because NSAIDs may cause premature closure of the ductus arteriosus, prescribing information for tolmetin specifically states use should be avoided late in pregnancy.

Based on available information, NSAIDs can be continued during the first 2 trimesters of pregnancy in patients with rheumatic and musculoskeletal diseases; use in the third trimester is not recommended (ACR [Sammaritano 2020]).

Breastfeeding Considerations

Tolmetin is present in breast milk.

The excretion of tolmetin into breast milk was evaluated in 1 lactating woman, 2 months postpartum. Following a single dose of tolmetin 400 mg, the highest breast milk concentration (0.18 mcg/mL) was obtained 1 hour after the dose. Tolmetin was no longer detectable in breast milk 5 hours after the maternal dose (<0.03 mcg/mL) (Sagraves 1985).

Nonsteroidal anti-inflammatory drugs (NSAIDs) are considered compatible for the treatment of rheumatic and musculoskeletal diseases in lactating patients; agents with a short half-life and established safety data in infants may be preferred (ACR [Sammaritano 2020]).

Due to the potential for serious adverse reactions in the breastfeeding infant, the manufacturer recommends a decision be made whether to discontinue breastfeeding or to discontinue the drug, considering the importance of treatment to the mother. Maternal use of NSAIDs should be avoided if the breastfeeding infant has platelet dysfunction, thrombocytopenia, or a ductal-dependent cardiac lesion (ABM [Martin 2018]; ABM [Reece-Stremtan 2017]; Bloor 2013).

Dietary Considerations

May administer with antacids to minimize stomach upset. Administration with food or milk decreases bioavailability. Some products may contain sodium.

Monitoring Parameters

CBC and chemistry profile in patients on long-term therapy; in patients with an increased risk for renal failure (CHF or decreased renal function, taking ACE inhibitors or diuretics, elderly), monitor renal function; signs or symptoms of GI bleeding and/or hepatic dysfunction; blood pressure closely during initiation of therapy and periodically thereafter; ophthalmologic exam in patients who develop visual disturbances.

Mechanism of Action

Reversibly inhibits cyclooxygenase-1 and 2 (COX-1 and 2) enzymes, which results in decreased formation of prostaglandin precursors; has antipyretic, analgesic, and anti-inflammatory properties.

Other proposed mechanisms not fully elucidated (and possibly contributing to the anti-inflammatory effect to varying degrees) include inhibiting chemotaxis, altering lymphocyte activity, inhibiting neutrophil aggregation/activation, and decreasing proinflammatory cytokine levels.

Pharmacokinetics (Adult Data Unless Noted)

Onset of action: Analgesic: 1 to 2 hours; Anti-inflammatory: Days to weeks

Absorption: Well absorbed, rapid

Protein binding: 99%

Metabolism: Hepatic via oxidation and conjugation

Bioavailability: Reduced 16% with food or milk

Half-life elimination: Biphasic: Rapid: 1 to 2 hours; Slow: ~5 hours

Time to peak, serum: 30 to 60 minutes

Excretion: Urine (as inactive metabolites or conjugates) within 24 hours

Brand Names: International
International Brand Names by Country
For country code abbreviations (show table)

  • (AE) United Arab Emirates: Tolectin;
  • (BE) Belgium: Tolectin;
  • (BG) Bulgaria: Tolectin;
  • (CH) Switzerland: Tolectin;
  • (CZ) Czech Republic: Tolectin;
  • (DO) Dominican Republic: Tolectin;
  • (EG) Egypt: Rumatol | Tolectin | Tolmet ds;
  • (ES) Spain: Artrocaptin;
  • (GB) United Kingdom: Tolectin;
  • (JO) Jordan: Tolectin;
  • (JP) Japan: Tolectin;
  • (KR) Korea, Republic of: Tolectin;
  • (LT) Lithuania: Tolectin;
  • (LU) Luxembourg: Tolectin;
  • (LV) Latvia: Tolectin;
  • (MX) Mexico: Tolectin;
  • (NL) Netherlands: Tolectin | Tolectin-400;
  • (PL) Poland: Tolectin;
  • (PR) Puerto Rico: Tolectin | Tolectin ds;
  • (SA) Saudi Arabia: Tolectin;
  • (TR) Turkey: Tolectin;
  • (TW) Taiwan: Tolectin | Tolmetin
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  32. Tolectin (tolmetin) [prescribing information]. Owens Cross Roads, AL: Poly Pharmaceuticals, Inc; February 2024.
  33. Tolmetin sodium capsules (400 mg) [prescribing information]. East Brunswick, NJ: Rising Pharma Holdings, Inc; December 2024.
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  35. Tolmetin sodium tablets (600 mg) [prescribing information]. East Brunswick, NJ: Rising Pharma Holdings Inc; December 2024.
  36. Tolmetin sodium tablets (600 mg) [prescribing information]. Sylacauga, AL: Atland Pharmaceuticals, LLC; January 2025.
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